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<a class="jxr_linenumber" name="1" href="#1">1</a>   <strong class="jxr_keyword">package</strong> bench.libs;
<a class="jxr_linenumber" name="2" href="#2">2</a>   
<a class="jxr_linenumber" name="3" href="#3">3</a>   <strong class="jxr_keyword">import</strong> java.lang.reflect.Field;
<a class="jxr_linenumber" name="4" href="#4">4</a>   <strong class="jxr_keyword">import</strong> java.util.Arrays;
<a class="jxr_linenumber" name="5" href="#5">5</a>   <strong class="jxr_keyword">import</strong> java.util.LinkedList;
<a class="jxr_linenumber" name="6" href="#6">6</a>   <strong class="jxr_keyword">import</strong> java.util.List;
<a class="jxr_linenumber" name="7" href="#7">7</a>   <strong class="jxr_keyword">import</strong> java.util.Vector;
<a class="jxr_linenumber" name="8" href="#8">8</a>   
<a class="jxr_linenumber" name="9" href="#9">9</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../bench/libs/ClassScope.html">ClassScope</a> {
<a class="jxr_linenumber" name="10" href="#10">10</a>  
<a class="jxr_linenumber" name="11" href="#11">11</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String[] EMPTY_LIBRARY_ARRAY = <strong class="jxr_keyword">new</strong> String[] {};
<a class="jxr_linenumber" name="12" href="#12">12</a>  	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Throwable CVF_FAILURE; <em class="jxr_comment">// set in &lt;clinit&gt;</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  
<a class="jxr_linenumber" name="14" href="#14">14</a>  	<strong class="jxr_keyword">static</strong> {
<a class="jxr_linenumber" name="15" href="#15">15</a>  
<a class="jxr_linenumber" name="16" href="#16">16</a>  		Throwable failure = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="17" href="#17">17</a>  		Field field = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="18" href="#18">18</a>  
<a class="jxr_linenumber" name="19" href="#19">19</a>  		<strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="20" href="#20">20</a>  			<em class="jxr_comment">// this can fail if this is not a Sun-compatible JVM</em>
<a class="jxr_linenumber" name="21" href="#21">21</a>  			<em class="jxr_comment">// or if the security is too tight:</em>
<a class="jxr_linenumber" name="22" href="#22">22</a>  
<a class="jxr_linenumber" name="23" href="#23">23</a>  			field = ClassLoader.<strong class="jxr_keyword">class</strong>.getDeclaredField(<span class="jxr_string">"loadedLibraryNames"</span>);
<a class="jxr_linenumber" name="24" href="#24">24</a>  
<a class="jxr_linenumber" name="25" href="#25">25</a>  			<strong class="jxr_keyword">if</strong> (field.getType() != Vector.<strong class="jxr_keyword">class</strong>) {
<a class="jxr_linenumber" name="26" href="#26">26</a>  				<strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> RuntimeException(<span class="jxr_string">"not of type java.util.Vector: "</span>
<a class="jxr_linenumber" name="27" href="#27">27</a>  						+ field.getType().getName());
<a class="jxr_linenumber" name="28" href="#28">28</a>  			}
<a class="jxr_linenumber" name="29" href="#29">29</a>  
<a class="jxr_linenumber" name="30" href="#30">30</a>  			field.setAccessible(<strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="31" href="#31">31</a>  
<a class="jxr_linenumber" name="32" href="#32">32</a>  		} <strong class="jxr_keyword">catch</strong> (Throwable t) {
<a class="jxr_linenumber" name="33" href="#33">33</a>  			failure = t;
<a class="jxr_linenumber" name="34" href="#34">34</a>  		}
<a class="jxr_linenumber" name="35" href="#35">35</a>  
<a class="jxr_linenumber" name="36" href="#36">36</a>  		LIBRARIES_VECTOR_FIELD = field;
<a class="jxr_linenumber" name="37" href="#37">37</a>  		CVF_FAILURE = failure;
<a class="jxr_linenumber" name="38" href="#38">38</a>  
<a class="jxr_linenumber" name="39" href="#39">39</a>  		failure = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="40" href="#40">40</a>  
<a class="jxr_linenumber" name="41" href="#41">41</a>  	}
<a class="jxr_linenumber" name="42" href="#42">42</a>  
<a class="jxr_linenumber" name="43" href="#43">43</a>  	<em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_javadoccomment">	 * Given a class loader instance, returns all native libraries currently</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_javadoccomment">	 * loaded by that class loader.</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <em class="jxr_javadoccomment">	 * </em>
<a class="jxr_linenumber" name="47" href="#47">47</a>  <em class="jxr_javadoccomment">	 * @param defining</em>
<a class="jxr_linenumber" name="48" href="#48">48</a>  <em class="jxr_javadoccomment">	 *            class loader to inspect [may not be null]</em>
<a class="jxr_linenumber" name="49" href="#49">49</a>  <em class="jxr_javadoccomment">	 * @return Libraries loaded in this class loader [never null, may be empty]</em>
<a class="jxr_linenumber" name="50" href="#50">50</a>  <em class="jxr_javadoccomment">	 * </em>
<a class="jxr_linenumber" name="51" href="#51">51</a>  <em class="jxr_javadoccomment">	 * @throws RuntimeException</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>  <em class="jxr_javadoccomment">	 *             if the "loadedLibraryNames" field hack is not possible in</em>
<a class="jxr_linenumber" name="53" href="#53">53</a>  <em class="jxr_javadoccomment">	 *             this JRE</em>
<a class="jxr_linenumber" name="54" href="#54">54</a>  <em class="jxr_javadoccomment">	 */</em>
<a class="jxr_linenumber" name="55" href="#55">55</a>  	@SuppressWarnings(<span class="jxr_string">"unchecked"</span>)
<a class="jxr_linenumber" name="56" href="#56">56</a>  	<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> String[] getLoadedLibraries(<strong class="jxr_keyword">final</strong> ClassLoader loader) {
<a class="jxr_linenumber" name="57" href="#57">57</a>  
<a class="jxr_linenumber" name="58" href="#58">58</a>  		<strong class="jxr_keyword">if</strong> (loader == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="59" href="#59">59</a>  			<strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"null input: loader"</span>);
<a class="jxr_linenumber" name="60" href="#60">60</a>  		}
<a class="jxr_linenumber" name="61" href="#61">61</a>  
<a class="jxr_linenumber" name="62" href="#62">62</a>  		<strong class="jxr_keyword">if</strong> (LIBRARIES_VECTOR_FIELD == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="63" href="#63">63</a>  			<strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> RuntimeException(
<a class="jxr_linenumber" name="64" href="#64">64</a>  					<span class="jxr_string">"ClassScope::getLoadedLibraries() cannot be used in this JRE"</span>,
<a class="jxr_linenumber" name="65" href="#65">65</a>  					CVF_FAILURE);
<a class="jxr_linenumber" name="66" href="#66">66</a>  		}
<a class="jxr_linenumber" name="67" href="#67">67</a>  
<a class="jxr_linenumber" name="68" href="#68">68</a>  		<strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="69" href="#69">69</a>  
<a class="jxr_linenumber" name="70" href="#70">70</a>  			<strong class="jxr_keyword">final</strong> Vector&lt;String&gt; libraries = (Vector&lt;String&gt;) LIBRARIES_VECTOR_FIELD
<a class="jxr_linenumber" name="71" href="#71">71</a>  					.get(loader);
<a class="jxr_linenumber" name="72" href="#72">72</a>  
<a class="jxr_linenumber" name="73" href="#73">73</a>  			<strong class="jxr_keyword">if</strong> (libraries == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="74" href="#74">74</a>  				<strong class="jxr_keyword">return</strong> EMPTY_LIBRARY_ARRAY;
<a class="jxr_linenumber" name="75" href="#75">75</a>  			}
<a class="jxr_linenumber" name="76" href="#76">76</a>  
<a class="jxr_linenumber" name="77" href="#77">77</a>  			<strong class="jxr_keyword">final</strong> String[] result;
<a class="jxr_linenumber" name="78" href="#78">78</a>  
<a class="jxr_linenumber" name="79" href="#79">79</a>  			<em class="jxr_comment">// note: Vector is synchronized in Java 2, which helps us make</em>
<a class="jxr_linenumber" name="80" href="#80">80</a>  			<em class="jxr_comment">// the following into a safe critical section:</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  			<strong class="jxr_keyword">synchronized</strong> (libraries) {
<a class="jxr_linenumber" name="82" href="#82">82</a>  				result = libraries.toArray(<strong class="jxr_keyword">new</strong> String[] {});
<a class="jxr_linenumber" name="83" href="#83">83</a>  			}
<a class="jxr_linenumber" name="84" href="#84">84</a>  
<a class="jxr_linenumber" name="85" href="#85">85</a>  			<strong class="jxr_keyword">return</strong> result;
<a class="jxr_linenumber" name="86" href="#86">86</a>  
<a class="jxr_linenumber" name="87" href="#87">87</a>  		}
<a class="jxr_linenumber" name="88" href="#88">88</a>  
<a class="jxr_linenumber" name="89" href="#89">89</a>  		<em class="jxr_comment">// this should not happen if &lt;clinit&gt; was successful:</em>
<a class="jxr_linenumber" name="90" href="#90">90</a>  		<strong class="jxr_keyword">catch</strong> (IllegalAccessException e) {
<a class="jxr_linenumber" name="91" href="#91">91</a>  			e.printStackTrace(System.out);
<a class="jxr_linenumber" name="92" href="#92">92</a>  			<strong class="jxr_keyword">return</strong> EMPTY_LIBRARY_ARRAY;
<a class="jxr_linenumber" name="93" href="#93">93</a>  		}
<a class="jxr_linenumber" name="94" href="#94">94</a>  	}
<a class="jxr_linenumber" name="95" href="#95">95</a>  
<a class="jxr_linenumber" name="96" href="#96">96</a>  	<em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="97" href="#97">97</a>  <em class="jxr_javadoccomment">	 * A convenience multi-loader version of</em>
<a class="jxr_linenumber" name="98" href="#98">98</a>  <em class="jxr_javadoccomment">	 * {@link #getLoadedLibraries(ClassLoader)}.</em>
<a class="jxr_linenumber" name="99" href="#99">99</a>  <em class="jxr_javadoccomment">	 * </em>
<a class="jxr_linenumber" name="100" href="#100">100</a> <em class="jxr_javadoccomment">	 * @param an</em>
<a class="jxr_linenumber" name="101" href="#101">101</a> <em class="jxr_javadoccomment">	 *            array of defining class loaders to inspect [may not be null]</em>
<a class="jxr_linenumber" name="102" href="#102">102</a> <em class="jxr_javadoccomment">	 * @return String array [never null, may be empty]</em>
<a class="jxr_linenumber" name="103" href="#103">103</a> <em class="jxr_javadoccomment">	 * </em>
<a class="jxr_linenumber" name="104" href="#104">104</a> <em class="jxr_javadoccomment">	 * @throws RuntimeException</em>
<a class="jxr_linenumber" name="105" href="#105">105</a> <em class="jxr_javadoccomment">	 *             if the "loadedLibrayNames" field hack is not possible in this</em>
<a class="jxr_linenumber" name="106" href="#106">106</a> <em class="jxr_javadoccomment">	 *             JRE</em>
<a class="jxr_linenumber" name="107" href="#107">107</a> <em class="jxr_javadoccomment">	 */</em>
<a class="jxr_linenumber" name="108" href="#108">108</a> 	<strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> String[] getLoadedLibraries(<strong class="jxr_keyword">final</strong> ClassLoader[] loaders) {
<a class="jxr_linenumber" name="109" href="#109">109</a> 		<strong class="jxr_keyword">if</strong> (loaders == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="110" href="#110">110</a> 			<strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(<span class="jxr_string">"null input: loaders"</span>);
<a class="jxr_linenumber" name="111" href="#111">111</a> 		}
<a class="jxr_linenumber" name="112" href="#112">112</a> 		<strong class="jxr_keyword">final</strong> List&lt;String&gt; resultList = <strong class="jxr_keyword">new</strong> LinkedList&lt;String&gt;();
<a class="jxr_linenumber" name="113" href="#113">113</a> 
<a class="jxr_linenumber" name="114" href="#114">114</a> 		<strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> l = 0; l &lt; loaders.length; ++l) {
<a class="jxr_linenumber" name="115" href="#115">115</a> 			<strong class="jxr_keyword">final</strong> ClassLoader loader = loaders[l];
<a class="jxr_linenumber" name="116" href="#116">116</a> 			<strong class="jxr_keyword">if</strong> (loader != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="117" href="#117">117</a> 				<strong class="jxr_keyword">final</strong> String[] libraries = getLoadedLibraries(loaders[l]);
<a class="jxr_linenumber" name="118" href="#118">118</a> 				resultList.addAll(Arrays.asList(libraries));
<a class="jxr_linenumber" name="119" href="#119">119</a> 			}
<a class="jxr_linenumber" name="120" href="#120">120</a> 		}
<a class="jxr_linenumber" name="121" href="#121">121</a> 
<a class="jxr_linenumber" name="122" href="#122">122</a> 		<strong class="jxr_keyword">final</strong> String[] result = <strong class="jxr_keyword">new</strong> String[resultList.size()];
<a class="jxr_linenumber" name="123" href="#123">123</a> 		resultList.toArray(result);
<a class="jxr_linenumber" name="124" href="#124">124</a> 
<a class="jxr_linenumber" name="125" href="#125">125</a> 		<strong class="jxr_keyword">return</strong> result;
<a class="jxr_linenumber" name="126" href="#126">126</a> 
<a class="jxr_linenumber" name="127" href="#127">127</a> 	}
<a class="jxr_linenumber" name="128" href="#128">128</a> 
<a class="jxr_linenumber" name="129" href="#129">129</a> 	<em class="jxr_comment">// this class is not extendible</em>
<a class="jxr_linenumber" name="130" href="#130">130</a> 	<strong class="jxr_keyword">private</strong> <a href="../../bench/libs/ClassScope.html">ClassScope</a>() {
<a class="jxr_linenumber" name="131" href="#131">131</a> 	}
<a class="jxr_linenumber" name="132" href="#132">132</a> 
<a class="jxr_linenumber" name="133" href="#133">133</a> 	<em class="jxr_comment">// set in &lt;clinit&gt; [can be null]</em>
<a class="jxr_linenumber" name="134" href="#134">134</a> 	<strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Field LIBRARIES_VECTOR_FIELD;
<a class="jxr_linenumber" name="135" href="#135">135</a> 
<a class="jxr_linenumber" name="136" href="#136">136</a> }
</pre>
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